// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_PLATFORM_WINDOW_PLATFORM_WINDOW_DELEGATE_H_
#define UI_PLATFORM_WINDOW_PLATFORM_WINDOW_DELEGATE_H_

#include "ui/gfx/native_widget_types.h"

namespace gfx {
class Rect;
}

namespace ui {

class Event;

enum PlatformWindowState {
    PLATFORM_WINDOW_STATE_UNKNOWN,
    PLATFORM_WINDOW_STATE_MAXIMIZED,
    PLATFORM_WINDOW_STATE_MINIMIZED,
    PLATFORM_WINDOW_STATE_NORMAL,
    PLATFORM_WINDOW_STATE_FULLSCREEN,
};

class PlatformWindowDelegate {
public:
    virtual ~PlatformWindowDelegate() { }

    // Note that |new_bounds| is in physical screen coordinates.
    virtual void OnBoundsChanged(const gfx::Rect& new_bounds) = 0;

    // Note that |damaged_region| is in the platform-window's coordinates, in
    // physical pixels.
    virtual void OnDamageRect(const gfx::Rect& damaged_region) = 0;

    virtual void DispatchEvent(Event* event) = 0;

    virtual void OnCloseRequest() = 0;
    virtual void OnClosed() = 0;

    virtual void OnWindowStateChanged(PlatformWindowState new_state) = 0;

    virtual void OnLostCapture() = 0;

    virtual void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget,
        float device_pixel_ratio)
        = 0;

    // Notifies the delegate that the widget cannot be used anymore until
    // a new widget is made available through OnAcceleratedWidgetAvailable().
    virtual void OnAcceleratedWidgetDestroyed() = 0;

    virtual void OnActivationChanged(bool active) = 0;
};

} // namespace ui

#endif // UI_PLATFORM_WINDOW_PLATFORM_WINDOW_DELEGATE_H_
